Petroleum Products QC

-Gasoline  Reid Vapor Pressure (RVP) prediction from Distillation data Predicted RVP values from Initial Boiling Point (IBP) is useful as an easy way for using the same for volatility calculations like emission product loss, product handling at different temperature etc. Gasoline vapor pressure is due to light hydrocarbons or more volatile part of Gasoline. As per definition RVP is the vapor pressure expressed at 37.8 deg C ( 100 deg F) in specified equipment conditions. Incidentally, this is the temperature around which ASTM D 86 Initial Boiling Point (IBP) is observed for Gasoline samples. Luckily for us, the smooth performance of gasoline fuel in internal combustion engine and environment restriction of volatile emissions desires typical lighter hydrocarbon components in gasoline.  These aspects are controlled by Gasoline specification by having minimum and maximum Vapor pressure,  minimum lighter hydrocarbon controlled by front end distillation parameters (min 10% evapora

Following article is mainly for gasoil,  how to predict blended product Kin. Viscosity. Kin. Viscosity  like Flash point is not an additive property. How to predict Kin. Viscosity of resultant product after blending two stocks ?  or  how to get volume required of products to get desired  blended product Kin. Viscosity ? Many times Viscosity improvement is desired by blending higher Viscosity petroleum product to lower Viscosity Product at Petroleum storage depots. Following table and formula can be used to predict the desirable variable figure of  kin. Viscosity or volume of product.   In the table below against  Kin. Viscosity (cSt)   viscosity blending number " A " is listed in next column. Formula : Ar  * 100  =  (V1 * A1 )  +  (V2 *A2) A for Resultant KV * 100 = ( Volume % of  Stock1 * A for  Stock1  ) + ( Volume % of Stock2  * A for Stock2 ) Kin. Viscosity is in cSt and it is at any given temperature. Where  Viscosity blending number A can